*,
::after,
::before {
    box-sizing:border-box;
    margin:0;
    padding:0;
}

body {
    color:#212529;
    font-family:Arial,sans-serif;
    font-size:1rem;
    font-weight:400;
    line-height:1.5;
    -webkit-text-size-adjust:100%;
}

.overlay {
    align-items:center;
    display:flex;
    height:100vh;
    justify-content:center;
    width:100vw;
    z-index:99999;
    position:fixed;
    bottom:0;
    left:0;
    right:0;
    top:0;
}

.overlay img {
    height:50px;
    width:50px;
}